Nothing is known about the origins of the Blackwolds. Yet, it is implied that they were a group of Men from Bree-land that broke their ties with the rest of the free peoples. It is not stated what motivated them to do so.

The group was led by William Skunkwood who allied it with the forces of Angmar. After William's death, Éogan took over leadership of the group. He too was slain. After his death the Blackwolds broke apart and severed their ties with Angmar.

The Blackwolds regrouped and with the help of Calder Cob they planned a direct attack on the town of Archet. Along with Éogan the Blackwolds managed to set the town on fire. They captured Mundo again, but learned that he wasn't carrying the treasure they were looking for. They quickly retreated, but managed to destroy half of Archet in their assault.[2]